move mtpr.h to vax directory

[unix-history] / usr / src / sys / netinet / in_pcb.c

diff --git a/usr/src/sys/netinet/in_pcb.c b/usr/src/sys/netinet/in_pcb.c
index c79eea0..689cb62 100644 (file)
--- a/usr/src/sys/netinet/in_pcb.c
+++ b/usr/src/sys/netinet/in_pcb.c
@@ -1,4 +1,4 @@
-/* in_pcb.c 4.13 81/12/11 */
+/*     in_pcb.c        4.32    82/10/09        */

 
 #include "../h/param.h"
 #include "../h/systm.h"
 
 #include "../h/param.h"
 #include "../h/systm.h"


@@ -7,122 +7,149 @@
 #include "../h/mbuf.h"
 #include "../h/socket.h"
 #include "../h/socketvar.h"
 #include "../h/mbuf.h"
 #include "../h/socket.h"
 #include "../h/socketvar.h"

-#include "../net/in.h"
-#include "../net/in_systm.h"
+#include "../netinet/in.h"
+#include "../netinet/in_systm.h"

 #include "../net/if.h"
 #include "../net/if.h"

-#include "../net/in_pcb.h"
+#include "../net/route.h"
+#include "../netinet/in_pcb.h"
+#include "../h/protosw.h"

 
 

-/*
- * Routines to manage internet protocol control blocks.
- *
- * At PRU_ATTACH time a protocol control block is allocated in
- * in_pcballoc() and inserted on a doubly-linked list of such blocks
- * for the protocol.  A port address is either requested (and verified
- * to not be in use) or assigned at this time.  We also allocate
- * space in the socket sockbuf structures here, although this is
- * not a clearly correct place to put this function.
- *
- * A connectionless protocol will have its protocol control block
- * removed at PRU_DETACH time, when the socket will be freed (freeing
- * the space reserved) and the block will be removed from the list of
- * blocks for its protocol.
- *
- * A connection-based protocol may be connected to a remote peer at
- * PRU_CONNECT time through the routine in_pcbconnect().  In the normal
- * case a PRU_DISCONNECT occurs causing a in_pcbdisconnect().
- * It is also possible that higher-level routines will opt out of the
- * relationship with the connection before the connection shut down
- * is complete.  This often occurs in protocols like TCP where we must
- * hold on to the protocol control block for a unreasonably long time
- * after the connection is used up to avoid races in later connection
- * establishment.  To handle this we allow higher-level routines to
- * disassociate themselves from the socket, marking it SS_USERGONE while
- * the disconnect is in progress.  We notice that this has happened
- * when the disconnect is complete, and perform the PRU_DETACH operation,
- * freeing the socket.
- *
- * TODO:
- *     use hashing
- */

 struct in_addr zeroin_addr;
 
 struct in_addr zeroin_addr;
 

-/*
- * Allocate a protocol control block, space
- * for send and receive data, and local host information.
- * Return error.  If no error make socket point at pcb.
- */
-in_pcbattach(so, head, sndcc, rcvcc, sin)
+in_pcbreserve(so, sndcc, rcvcc)

        struct socket *so;
        struct socket *so;

-       struct inpcb *head;

        int sndcc, rcvcc;
        int sndcc, rcvcc;

-       struct sockaddr_in *sin;

 {
 {

-       struct mbuf *m;
-       register struct inpcb *inp;
-       struct ifnet *ifp;
-       u_short lport;
-
-COUNT(IN_PCBATTACH);
-       if (sin) {
-               if (sin->sin_family != AF_INET)
-                       return (EAFNOSUPPORT);
-               ifp = if_ifwithaddr(sin->sin_addr);
-               if (ifp == 0)
-                       return (EADDRNOTAVAIL);
-               lport = sin->sin_port;
-               if (lport &&
-                   in_pcblookup(head, zeroin_addr, 0, sin->sin_addr, lport))
-                       return (EADDRINUSE);
-       } else {
-               ifp = if_ifwithaddr(ifnet->if_addr);
-               lport = 0;
-       }
-       m = m_getclr(0);
-       if (m == 0)
-               return (ENOBUFS);
+

        if (sbreserve(&so->so_snd, sndcc) == 0)
                goto bad;
        if (sbreserve(&so->so_rcv, rcvcc) == 0)
                goto bad2;
        if (sbreserve(&so->so_snd, sndcc) == 0)
                goto bad;
        if (sbreserve(&so->so_rcv, rcvcc) == 0)
                goto bad2;

+       return (0);
+bad2:
+       sbrelease(&so->so_snd);
+bad:
+       return (ENOBUFS);
+}
+
+in_pcballoc(so, head)
+       struct socket *so;
+       struct inpcb *head;
+{
+       struct mbuf *m;
+       register struct inpcb *inp;
+
+       m = m_getclr(M_DONTWAIT);
+       if (m == 0)
+               return (ENOBUFS);

        inp = mtod(m, struct inpcb *);
        inp->inp_head = head;
        inp = mtod(m, struct inpcb *);
        inp->inp_head = head;

-       inp->inp_laddr = ifp->if_addr;
+       inp->inp_socket = so;
+       insque(inp, head);
+       so->so_pcb = (caddr_t)inp;
+       return (0);
+}
+       
+in_pcbbind(inp, nam)
+       register struct inpcb *inp;
+       struct mbuf *nam;
+{
+       register struct socket *so = inp->inp_socket;
+       register struct inpcb *head = inp->inp_head;
+       register struct sockaddr_in *sin;
+       u_short lport = 0;
+
+       if (ifnet == 0)
+               return (EADDRNOTAVAIL);
+       if (inp->inp_lport || inp->inp_laddr.s_addr)
+               return (EINVAL);
+       if (nam == 0)
+               goto noname;
+       sin = mtod(nam, struct sockaddr_in *);
+       if (nam->m_len != sizeof (*sin))
+               return (EINVAL);
+       if (sin->sin_addr.s_addr) {
+               int tport = sin->sin_port;
+
+               sin->sin_port = 0;              /* yech... */
+               if (if_ifwithaddr((struct sockaddr *)sin) == 0)
+                       return (EADDRNOTAVAIL);
+               sin->sin_port = tport;
+       }
+       lport = sin->sin_port;
+       if (lport) {
+               u_short aport = lport;
+               int wild = 0;
+
+#if vax
+               aport = htons(aport);
+#endif
+               /* GROSS */
+               if (aport < IPPORT_RESERVED && u.u_uid != 0)
+                       return (EACCES);
+               if ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0)
+                       wild = INPLOOKUP_WILDCARD;
+               if (in_pcblookup(head,
+                   zeroin_addr, 0, sin->sin_addr, lport, wild))
+                       return (EADDRINUSE);
+       }
+       inp->inp_laddr = sin->sin_addr;
+noname:

        if (lport == 0)
                do {
        if (lport == 0)
                do {

-                       if (head->inp_lport++ < 1024)
-                               head->inp_lport = 1024;
+                       if (head->inp_lport++ < IPPORT_RESERVED)
+                               head->inp_lport = IPPORT_RESERVED;

                        lport = htons(head->inp_lport);
                        lport = htons(head->inp_lport);

-               } while (in_pcblookup(head, zeroin_addr, 0, inp->inp_laddr, lport));
+               } while (in_pcblookup(head,
+                           zeroin_addr, 0, inp->inp_laddr, lport, 0));

        inp->inp_lport = lport;
        inp->inp_lport = lport;

-       inp->inp_socket = so;
-       insque(inp, head);
-       so->so_pcb = (caddr_t)inp;
-       sin = (struct sockaddr_in *)&so->so_addr;
-       sin->sin_family = AF_INET;
-       sin->sin_addr = inp->inp_laddr;
-       sin->sin_port = inp->inp_lport;

        return (0);
        return (0);

-bad2:
-       sbrelease(&so->so_snd);
-bad:
-       (void) m_free(m);
-       return (ENOBUFS);

 }
 
 }
 

-in_pcbconnect(inp, sin)
+/*
+ * Connect from a socket to a specified address.
+ * Both address and port must be specified in argument sin.
+ * If don't have a local address for this socket yet,
+ * then pick one.
+ */
+in_pcbconnect(inp, nam)

        struct inpcb *inp;
        struct inpcb *inp;

-       struct sockaddr_in *sin;
+       struct mbuf *nam;

 {
 {

-       struct inpcb *xp;
+       struct ifnet *ifp;
+       struct sockaddr_in *ifaddr;
+       register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);

 
 

-COUNT(IN_PCBCONNECT);
+       if (nam->m_len != sizeof (*sin))
+               return (EINVAL);

        if (sin->sin_family != AF_INET)
                return (EAFNOSUPPORT);
        if (sin->sin_addr.s_addr == 0 || sin->sin_port == 0)
                return (EADDRNOTAVAIL);
        if (sin->sin_family != AF_INET)
                return (EAFNOSUPPORT);
        if (sin->sin_addr.s_addr == 0 || sin->sin_port == 0)
                return (EADDRNOTAVAIL);

-       xp = in_pcblookup(inp->inp_head, sin->sin_addr, sin->sin_port, inp->inp_laddr, inp->inp_lport);
-       if (xp->inp_faddr.s_addr)
+       if (inp->inp_laddr.s_addr == 0) {
+               ifp = if_ifonnetof(in_netof(sin->sin_addr));
+               if (ifp == 0) {
+                       /*
+                        * We should select the interface based on
+                        * the route to be used, but for udp this would
+                        * result in two calls to rtalloc for each packet
+                        * sent; hardly worthwhile...
+                        */
+                       ifp = if_ifwithaf(AF_INET);
+                       if (ifp == 0)
+                               return (EADDRNOTAVAIL);
+               }
+               ifaddr = (struct sockaddr_in *)&ifp->if_addr;
+       }
+       if (in_pcblookup(inp->inp_head,
+           sin->sin_addr,
+           sin->sin_port,
+           inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
+           inp->inp_lport,
+           0))

                return (EADDRINUSE);
                return (EADDRINUSE);

+       if (inp->inp_laddr.s_addr == 0)
+               inp->inp_laddr = ifaddr->sin_addr;

        inp->inp_faddr = sin->sin_addr;
        inp->inp_fport = sin->sin_port;
        return (0);
        inp->inp_faddr = sin->sin_addr;
        inp->inp_fport = sin->sin_port;
        return (0);


@@ -132,9 +159,9 @@ in_pcbdisconnect(inp)
        struct inpcb *inp;
 {
 
        struct inpcb *inp;
 {
 

-COUNT(IN_PCBDISCONNECT);

        inp->inp_faddr.s_addr = 0;
        inp->inp_faddr.s_addr = 0;

-       if (inp->inp_socket->so_state & SS_USERGONE)
+       inp->inp_fport = 0;
+       if (inp->inp_socket->so_state & SS_NOFDREF)

                in_pcbdetach(inp);
 }
 
                in_pcbdetach(inp);
 }
 


@@ -145,36 +172,97 @@ in_pcbdetach(inp)
 
        so->so_pcb = 0;
        sofree(so);
 
        so->so_pcb = 0;
        sofree(so);

+       if (inp->inp_route.ro_rt)
+               rtfree(inp->inp_route.ro_rt);

        remque(inp);
        (void) m_free(dtom(inp));
 }
 
        remque(inp);
        (void) m_free(dtom(inp));
 }
 

+in_setsockaddr(inp, nam)
+       register struct inpcb *inp;
+       struct mbuf *nam;
+{
+       register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);
+       
+       nam->m_len = sizeof (*sin);
+       sin = mtod(nam, struct sockaddr_in *);
+       bzero((caddr_t)sin, sizeof (*sin));
+       sin->sin_family = AF_INET;
+       sin->sin_port = inp->inp_lport;
+       sin->sin_addr = inp->inp_laddr;
+}
+

 /*
 /*

- * Look for a control block to accept a segment.
- * First choice is an exact address match.
- * Second choice is a match of local address, with
- * unspecified foreign address.
+ * Pass an error to all internet connections
+ * associated with address sin.  Call the
+ * protocol specific routine to clean up the
+ * mess afterwards.

  */
  */

+in_pcbnotify(head, dst, errno, abort)
+       struct inpcb *head;
+       register struct in_addr *dst;
+       int errno, (*abort)();
+{
+       register struct inpcb *inp, *oinp;
+       int s = splimp();
+
+       for (inp = head->inp_next; inp != head;) {
+               if (inp->inp_faddr.s_addr != dst->s_addr) {
+       next:
+                       inp = inp->inp_next;
+                       continue;
+               }
+               if (inp->inp_socket == 0)
+                       goto next;
+               inp->inp_socket->so_error = errno;
+               oinp = inp;
+               inp = inp->inp_next;
+               (*abort)(oinp);
+       }
+       splx(s);
+}
+

 struct inpcb *
 struct inpcb *

-in_pcblookup(head, faddr, fport, laddr, lport)
+in_pcblookup(head, faddr, fport, laddr, lport, flags)

        struct inpcb *head;
        struct in_addr faddr, laddr;
        u_short fport, lport;
        struct inpcb *head;
        struct in_addr faddr, laddr;
        u_short fport, lport;

+       int flags;

 {
 {

-       register struct inpcb *inp;
-       struct inpcb *match = 0;
+       register struct inpcb *inp, *match = 0;
+       int matchwild = 3, wildcard;

 
        for (inp = head->inp_next; inp != head; inp = inp->inp_next) {
 
        for (inp = head->inp_next; inp != head; inp = inp->inp_next) {

-               if (inp->inp_laddr.s_addr != laddr.s_addr ||
-                   inp->inp_lport != lport)
+               if (inp->inp_lport != lport)

                        continue;
                        continue;

-               if (inp->inp_faddr.s_addr == 0) {
-                       match = inp;
+               wildcard = 0;
+               if (inp->inp_laddr.s_addr != 0) {
+                       if (laddr.s_addr == 0)
+                               wildcard++;
+                       else if (inp->inp_laddr.s_addr != laddr.s_addr)
+                               continue;
+               } else {
+                       if (laddr.s_addr != 0)
+                               wildcard++;
+               }
+               if (inp->inp_faddr.s_addr != 0) {
+                       if (faddr.s_addr == 0)
+                               wildcard++;
+                       else if (inp->inp_faddr.s_addr != faddr.s_addr ||
+                           inp->inp_fport != fport)
+                               continue;
+               } else {
+                       if (faddr.s_addr != 0)
+                               wildcard++;
+               }
+               if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0)

                        continue;
                        continue;

+               if (wildcard < matchwild) {
+                       match = inp;
+                       matchwild = wildcard;
+                       if (matchwild == 0)
+                               break;

                }
                }

-               if (inp->inp_faddr.s_addr == faddr.s_addr &&
-                   inp->inp_fport == fport)
-                       return (inp);

        }
        return (match);
 }
        }
        return (match);
 }